I wonder if this experience is suggestive of a not-quite-CrazyEgg but still useful technique: add a default click-handler to the whole page, that (in the absence of any real outlink) records the location of the click, and sends visitors to a plausible default 'second page' (or 'third page' if enacted on the second page, etc.). You get the illusion of responsiveness for any click, and capture the regions-of-most-confusion in a log somewhere.